/* 第2套：功能驱动 · 海军蓝三栏居中 */
:root {
  --navy: #0b1f3a;
  --sky: #1e88e5;
  --sky-dark: #1565c0;
  --ice: #f7fbff;
  --card: #ffffff;
  --text: #1a2b3c;
  --soft: #5a7084;
  --line: #d5e4f2;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--ice);
  color: var(--text);
  line-height: 1.7;
}

header.site {
  background: var(--navy);
  color: #fff;
}
.bar {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.04em;
}
nav.pills a {
  display: inline-block;
  color: #d6e6f8;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 999px;
  margin-left: 6px;
}
nav.pills a.current {
  background: var(--sky);
  color: #fff;
}

.hero-full {
  background: linear-gradient(160deg, #0b1f3a 0%, #16487a 100%);
  color: #fff;
  text-align: center;
  padding: 56px 20px 48px;
}
.hero-full h1 {
  font-size: 34px;
  max-width: 820px;
  margin: 0 auto 16px;
  line-height: 1.35;
}
.hero-full p { max-width: 720px; margin: 0 auto 22px; color: #d5e8fb; }
.btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}
.btn-on { background: #ffcc33; color: #1b2a14; }
.btn-off { background: transparent; color: #fff; border: 1px solid #9ec6ea; }

.wrap { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 36px 0; }
section.band { padding: 8px 0 28px; }
section.band.alt { background: #eef5fc; margin: 0 -100vw; padding: 36px 100vw; }
section h2 { font-size: 24px; text-align: center; margin: 0 0 20px; }

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 18px;
  box-shadow: 0 8px 20px rgba(11, 31, 58, 0.04);
}
.card h3 { margin: 8px 0; font-size: 18px; color: var(--navy); }
.icon-round {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: #e3f0fb;
  display: flex; align-items: center; justify-content: center;
}

.compare {
  width: 100%;
  border-collapse: collapse;
}
.compare th { background: var(--navy); color: #fff; padding: 10px; }
.compare td { border-bottom: 1px solid var(--line); padding: 10px; background: #fff; }

.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.faq-item { background: #fff; border-left: 4px solid var(--sky); padding: 14px 16px; }
.faq-item h3 { margin: 0 0 8px; font-size: 16px; }

footer {
  background: var(--navy);
  color: #c9d8e8;
  padding: 32px 0;
  font-size: 13px;
}
footer a { color: #8ec4f0; }
.center { text-align: center; }

@media (max-width: 900px) {
  .grid3, .faq-grid { grid-template-columns: 1fr; }
  .hero-full h1 { font-size: 26px; }
}